Additionally, intratumoral injection of miR-4644 antagomir downregulated miR-4644 expression in tumors and suppressed tumorigenesis in mouse xenografts. Collectively, miR-4644 promotes BCa progression by targeting UBIAD1. miR-4644 may be an important therapeutic target for BCa treatment.Full-thickness skin injury affects millions of people worldwide each year. Although bone marrow-derived mesenchymal stem cells (BM-MSCs) have been shown to promote cutaneous wound healing, they cannot functionally promote wound healing with the recovery of appendages such as hair follicles. We previously found that growth factor plus BM-MSCs could effectively promote wound healing and hair follicle regeneration. In the present study, we grafted insulin-like growth factor 1 (IGF1), a multifunctional cell growth factor, and BM-MSCs into a collagen-chitosan scaffold to investigate their effects on functional wound healing. Using scanning electron microscopy, histological staining, and quantitative analysis, we found that IGF1- and BM-MSC-incorporating collagen-chitosan scaffolds promote cutaneous wound healing with effective regeneration of hair follicles in a rat full-thickness skin injury model. In addition, IGF1/BM-MSCs inhibit inflammatory cytokines during wound healing. In vitro, we found that IGF1 promotes the proliferation and migration of BM-MSCs via the IGFR-mediated ERK1/2 signaling pathway. Collectively, in this study, we first demonstrated that IGF1 enhances BM-MSC-mediated wound healing as well as hair follicle regeneration. Our data suggest that the topical application of IGF1 and BM-MSCs incorporated in collagen-chitosan scaffolds can be used as a feasible and effective therapeutic approach to improve functional cutaneous wound healing.Cerebral ischemia/reperfusion (I/R) injury is a severe complication during the treatment of patients with stroke. It has been shown that the expression of SNHG15 was increased in patients with ischemic stroke (IS). However, the function and regulatory mechanism of SNHG15 in IS remains unclear.
An oxygen glucose deprivation/reoxygenation (OGD/R) cell model was use to establish an model of I/R injury. RT-qPCR assay was used to detect the level of SNHG15 in OGD/R-treated SH-SY5Y cells. Meanwhile, middle cerebral artery occlusion (MCAO) was used to establish an model of cerebral I/R injury.
The expression of SNHG15 was upregulated in OGD/R-treated SH-SY5Y cells. Downregulation of SNHG15 during reperfusion reduced cell death in OGD/R-treated SH-SY5Y cells. In addition, SNHG15 knockdown suppressed OGD/R-induced apoptosis in SY-SY5Y cells by attenuating intracellular ROS generation and reducing mitochondrial membrane potential (MMP) lost. In addition, SNHG15 knockdown promoted cell cycle transition in SY-SY5Y cells after OGD/R insult accompany with PI3K/Akt signaling activation. Meanwhile, mechanism investigations suggested SNHG15 knockdown downregulated the expression of FOXO1 through acting as a competitive 'sponge' of miR-183-5p. Most importantly, knockdown of SNHG15 expression inhibited neuronal apoptosis and decreased infarct area in MCAO rats.
Thus, the present study indicated that SNHG15 knockdown protected against cerebral I/R injury via targeting miR-183-5p/FOXO1 axis, which may represent a potential therapeutic option for the treatment of cerebral IS.
Thus, the present study indicated that SNHG15 knockdown protected against cerebral I/R injury via targeting miR-183-5p/FOXO1 axis, which may represent a potential therapeutic option for the treatment of cerebral IS.Mounting lines of evidence indicated that the "colony stimulating factor-1 (CSF-1)/tumor-associated macrophage (TAM)" signature plays an important role in the progression, invasion and metastasis of multiple tumors. However, the potential role of CSF-1/TAM in oral squamous cell carcinoma (OSCC) remains largely unknown. In the present study, the expression of CSF-1 from 99 OSCC specimens and its correlation with clinicopathological features and patient outcomes were investigated. Meanwhile, the correlation between CSF-1 expression and TAM infiltration was also explored. To investigate the potential effect of CSF-1 on tumor growth, nude mice were subcutaneously injected with Cal27 cell line and a small molecule inhibitor of CSF-1 (BZL945). The results showed that the high expression rate of CSF-1 (52%) was found in OSCC, and the upregulation of CSF-1 was closely correlated with lymph node metastasis and clinical stage. Additionally, there was a positive correlation between a high CSF-1 level and elevated TAM infiltration. The xenograft model study showed that CSF-1 signal blockade inhibited tumor growth, with a significant synchronous decrease in CSF-1 expression and TAM infiltration. Overall, our findings indicated that CSF-1 plays a crucial role in TAMs-mediated OSCC tumor progression and invasion. The "CSF-1/TAM" signaling axis may serve as a prospective target for anti-tumor therapy of OSCC.Circular RNAs (circRNAs), which are considered to be important functional regulators in cancer, have provided a new perspective regarding our understanding of tumor biology, including that of breast cancer. To investigate the regulatory effect of circRPPH1 on cellular behaviors of breast cancer and the potential mechanism, the expression of circRPPH1 and miR-556-5p in breast cancer tissues and cell lines were examined by quantitative RT-PCR. The regulatory effects of the circRPPH1/miR-556-5p/YAP1 axis on cellular behaviors of breast cancer cells were evaluated through functional experiments in vitro and tumor growth in vivo. The relationship between circRPPH1 and miR-556-5p/YAP1 was assessed using dual-luciferase reporter and RNA immunoprecipitation assays. PCR results showed that circRPPH1 levels were significantly upregulated in tumor tissues and breast cancer cells. Functionally, circRPPH1 promoted the proliferation, migration, invasion, and angiogenesis of breast cancer cell lines and tumor growth in vivo. https://www.selleckchem.com/products/stemRegenin-1.html Regarding the mechanism, dual-luciferase reporter and RNA immunoprecipitation assays showed that circRPPH1 was capable of sponging miR-556-5p to increase expression of the oncogene YAP1. Our data reveal that circRPPH1 plays a vital regulatory role in breast cancer via the miR-556-5p/YAP1 axis and may serve as a promising therapeutic target for breast cancer treatment.